ASP快速、简单连接SQL server

string conn = "Server=localhost;Initial Catalog=test;Trusted_Connection=SSPI";//系统权限连接
string conn2 = "server=.;Initial Catalog=test;user id=用户名;pwd=密码";//账号密码连接
string sql= new "select * from 表";

SqlDataAdapter adapter = new SqlDataAdapter(sql,conn);

var data = new DataTable();
try{
adapter.Fill(data);
}catch(SqlException e){
throw e;
}

for (var i = 0; i < data.Rows.Count; i++)
{
Response.Write("<tr>");
Response.Write("<td class='text-center col-md-2'>" + data.Rows[i]["num"].ToString() + "</td>");
Response.Write("</tr>");
}